Selective elevator lock



y s. H. MACY. SELECTIVE ELEVATOR LOCK.

APPLICATION FILED APR. 1| 192i.

BUILT EQMACY, or' BOSTON, MAssAcrrsE'mslf l f sELEcTrVE ELEVATOR- LOCK.r

iA'S/ZZ.

Application fled April 1,

To all w hom 'it m04/ concern.'

Bc it knou'n that l, BURT il. MACY, ya citizen oi the Uni-ted States, residing at Bos# ton, in the county ot Suffolk and VState of ilflassachneet-ts,r have invented new and useful improvements in `Selective Elevator- Locks, of which the following is a specification.

which are adapted to be used invconnection with elevator cars whereof the starting and stopping is controlled by a shipper cable. Locks of this type are generally'mou-nted on the lelevator-car and they cooperate Withknobs or buttons attached to the shipper cable to move the cable so as to stop the car when the latter has arrivedk at a given iioor.

V.These locks commonly have jaws which are vadaoted to be sarunof a art so as to ermit passage of the knobs Yon the shipper cable between them when the car is required to',

:pass a floor Without stopping, and to be Yl'n'owbfht into .a position Where they will Yinterfere with an adjacent knob in order to canse movement of the cable Whenthe car reaches the position vwhere it is to be stopped.

' `Such locks of prior construction, soV 'far as l am aware, have required the personal attention ci' an operator in order to be put f into vcondition for stopping the car at a selected stage, and the service of the operator y for that purpose has hadto be' rendered when the car was ,approaching :the Selected stage .and atte-r departure from the next stage .above or below.y In other Words, no means 'ng the 1 l v Y regardless .ot how many stages may intervene betr-veen the starting' point and the selectedy stopping' point. This object has been accom- V plisbed 'by simple means which l Willlpresentl5vv describe in detail with reference to the drawings forming apart of this specificai Speceaton of Letters Patent.

This invention' relates to elevator locks l on line 2 tion, and my presentinvention consists in equivalent s tructlnesand combinations ca` pable ofaccomplishing.thesameresults;`

In the, drawings;` v

VFigure il is a plan view, partly brokenv away and shown insection--on line, 1&1 of Figure 2, of the-embodiment ofmy selective elevator' lock .above referred toa Fig-ure Qlis "a vertical longitudnalvlsection 2 oit'Figure l..v

. Figure erative ,or 'lockingpositioI/i, Wliereasvli'gure l s-h-oivsthe-Jaws in their inoperative 1 3osit'ion-A .lliguret is. a side elevation lthe lock partly broken away toshow ythe interiorljof-V the cable guide.

i Figures Ajand V6 -areg sectional 4detail Vviews illustratin g, the pavvl. andy ratchet lmechanis-,In

i v,1P atented Apr,j ,25,5

is a view similar `to lllig'ure l,Y but showing the jawsof the lock 1n their op- *'55 the principles and means embodied .in `the d e-.. vice which I am about to describe andin ally by Which-theselective obstructor ot' my 1mproved lock is shifted. step byst'ep duringithe travel of the car. 'f .L Y, Figure 7 :is a detailsectienalview showing; alato-hing device. addition o the selective obstructorfor hold-ingdthe ljaws in inoperative position/ f I f Y. Like reference characters indicate the same parts in all of the Vfiguresfivlierever they occur.. -Y l I j My,se;ectivc lock 1s adapted Yto be carried by anelevator car, Whereforeit-,is mounted f dona .post 4or standard 10. 1which,it is to lbe nnderstood, is secured` to,'thelloorfor,any f other equivalent. part ottheicait It coop,- erates with a shipper'` cable*lylpand with -knolprs or buttons oi' equivalent enlargements 12, i3, each tapered atene end and having` ing a pair of vsuch knobs "fastened to, the cable` adjacent to --each stopping place arranged with their square ends .facing eacliotheigand separated tar enough-to'admitithe jaws-betiveen them, preferably in themanner; usual in this art. AThe 'casing-:of thellookwhich, as a whole,.is designated 14, is monntedron' the standard lO'fand has'a guiding ,eyeorthroat vl5 surnonnding the cable ,and tllir:c )ugh -vvliich the knobs thereon are 'adapted to'pass'tvhen y,

K the cary arrives at or departs from, or travels past, any appointed stopping place.,

Jaws 1 6, 17 are mounted inthecasing toV .embrace the cable, and' areadapted tO lbey short arm 22 Whichvis connected by a knuckle joint With one arm of a yoke 2b which is mountedV to slide in the case. This yoke has spread apart Widely enough to pass the knobs 12,'13 Without interference, as shown in yFigures 1 and 2, or to be brought together as shown in Figure 3, between tivo knobs of a pair so, as to interfere With the square. end of the knob neXt encountered in the travel of the car.- They are pivoted on studs or pins 18, 19 respectively, set inthe case and are acted upon by springs 20, 21, respectively, which are suitably arranged to exert force tending to shift them from the position shown in VFigure 1 to that of Figure 3. .ln its construction and mode ofv operation as Athus far described the lock is not substantially different from those heretofore known Aand used,l and patented, as shown in the patents to Edwin-E, Angell granted May 1, 1900, and Gotober 15, 1912.

Each of the jaws typiies any device which may be carried by Aan elevator lock to interferevvith the knobs orstops on the shipper lcable in the manner just described, my claim to protection is not necessarily ll'iinited to a construction having a pair of interfering members arranged as j avis, but this particular arrangement'is preferred for reasons having todo With convenience and eiiiriency, and therefore is adopted in the form of lock here shown.

Each jaw is a bell crank lever and has a an eye or apertured lug 24,'through the aperture of which passes a trigger lever which `is pivoted to the case at 26 and has a finger its rim Vfor indicating the floor or 'stage at flu ivhiclrtlie car is to be stopped. A; notch 30 in the rim of the ob'struotor is wide enough to admit the trigger lever, when brought into the Vpath of possible motion thereof, and

vdee, enouOh to vaermitthe triooerthen to move as needed forth'e jaws Ato be closed y that is, broughty intotheir operative posi' tion) by the springs 20 and 21. The mimbers referred to run inthe dirertion vrof the garrov,7 shown in Figure 1 from the notch 2?-0,

.andthe obstructor may be turned by manipulation of the operator about its pivot stud until any selected one of these numbers liesV beside a pointer 31,'or other index mark,

on the trigger.

A parvland ratchet mechanism is provided for moving the obstructor step byV step durk ing the travel of the car. Such mechanism consists of a series of ratchet teeth 32 on the under side of the disk, a paWl. 33 carried by a pawl carrier '8e which is adapted to oscillate about the pivot of the obstructor, andk a pusher 35 -which is connected to the pavvl carrier by a link 36, `This pusher is convenientlyv a bar Which occupies a guideivay 37 in the case and projects into the cable-guiding eye 15, being preferably approximately radial to the pivot of the pavvl. carrier and obstructor. lt is adapted to move endivise and is pressed aivay from such pivot by a spring 38 contained in a socket within the end of the pusher and con fined by the shoulder 30 inthe casing. The endof the'pusher which lies :in the cable guiding eye is adapted to engage the knobs or stops 12, and is provided with upwar 'and downwardly projecting Wings l0 of which the edges toward the cable lare so curved or inclined outwardly that they will ride overthe knobs, even the square ends ot such knobs,v The normal position ot the pusherfis that shorvn in Figures 3 and 'by dotted lines in' Figures 1 and 2, Thus when the lock is carried past any knob the paw] carrier, and inbeing thus displaced it moves the p'aivl through the spacing of one tooth of the ratchet. As there are two knobs applied to the cable at each stopping place of the car, it follows that the obm obstructoig' (or equivalent mark indicating the nearest stopping place to the one from which the cai' is started) is displaced from the notch 30 by the distance through Which the rim of the obstructor is turned byone push ofthe paivl, and the other numbers from one another by twice this distance,v vThe pawl here shown is aV pin contained in a socket 41 in the pawl carrier and resting on a spring 12, but any other ,uil adapten.l to perform essen tiel Y Vnot ,fi be here u d .n important feature of the Vpropelling meclianism for the obstructor co si ts in the fact that a considerable variationjin the en# tent of movement of the pusher is possible ia l than distance between tivo adjacent `ratchet teeth. Referring to Figures 1 andf 2 it will'bc sccnthat the outward movement of the pusher, that is, the .movement away from the pivot 29, ris limited by a. shoulder:

4 and and thus establishes the limit of" lpusher is displaced toward the axis ofthe 'i .Without causing any `greater niovement'of the Y pawl ceases vvhen the vlink 36 becomesperpendicular tothe pusher bar, andthe-length Vof this link and the position 'of the-pivot connecting it tothe pawl carrier are sodeterinined and located that themovement of the pusher from it-svouter limit to the position Where theflink isfnearly perpendicular to the path of the pusher, gives the -required distance of feeding travel Vto the pawvl.

That is, a sutlicient feeding travel is given when the link becomes nearly but ynot quite perpendicular to`v this path, and thereafter va considerable further movement of@ the pusher may take place Without causingappieciable displacement kof the pavvl'carrier;

While if theV movement continuesuntil the link vis swung past the perpendicular vposition, whatever movement isgthen transmitted to the paWlcarrier ,isaf retr'acting one of such slight yextent asnot to ln /ithdraw theV lpawl back `of Ithe next following Aratchet Thus one vmodel yor size of lock is adapted to varying conditions in which the shipper cables and the knobs onbuttons are larger orsmaller. ln different velevator'insta-llations tlie shippeicables vary moreorfless in diameter; Thiscauses the knobs, which are ordinarily .'inade ini tivo pieces `and clamped together embracing the cable,` to |be spread more orless Widely, andthere kmav4 also be some variation in the Width ofthe knobs themselves l i The pusher of my propelling mechanism.

allowed to yproject so far in itsxoutermost position that it Will'be movedby the smallest vknobs on the sinallestfsize cables far enough to shift the obstructor through one space, andthe latitude given bythe link motion for a further movement of the pusher without effect venables the `same mechanism,

having theV saine adjustment; to be usedA under Yconditions',"wliere larger cables and r wider knobs are found( from Ythe ground or'the top ofthe building,

4but designates the first, seconder Vother selected floor above or beloivfthe one from which the car isfstartedQ `llhen thishasv been done, the V(attendant..pullsthe shipper rope in theproper direction for causingV ascent or descent of the caras desired, and leaves it, Als the lockY is carried past successive Zknobs on the cable, .the `propelling mechanism shifts the obstructor disk step vby The number thus step'iinti-l the lfirst, ofthe two 'knobs at'the `selected floor is reached, and then the notch 30 is brought into register with the y'trigger 25, and the `iaivs are immediately allowed to inove into their' operative positionbetiveen vv'this knob andthe adjacent one. .Continued movement ofthe car causes the jaw'sto interfere With the second knob atthis stage and inanner and stop the car. The action is identical Whether the car rises or descends.

By vthe use of this invention upon freight-` elevators infactories and Warehouses a very to move thek shipper rope in the ordinary Y obvious'econoniy in operationis effected, be-

cause. itis 'unnecessary eitherfto procure a special operator for the 'cai' or '.torequire Workmen to fleave their` Work lwhen occasion arises for moving another.

goodsvfrom one vfloor' to I have-'shown in'Figure 7 means byivhicli -the'lockma'ybe rendered inoperative lwhen the car is being` lrun by an operator. A lug orV latching shoulder 45' is provided on the outerside'of the triggerQ to cooperateivith afshoulder or abutment 46 on the adjacent partfof the yoke 23-- orits.lug'24, for this purpose. When the trigger is. pulled back to open the javi/'sy Athis latch shoulder ridesv over the inclined face ofthe abutment'` 46,

and slips past the end -of the abutment,

which then 'holdstlie trigger displaced,'and interlocked with the yoke. Then the jaws "are ynot la'bleto return to 'locking' position until foreeisappl-ied to the trigger to dis-v engage' it. The cooperating vshoulders 45 andll4 are so shaped thatl their disengagementby force applied to the end yof the trigger is possible but will not take place undeiranyam'ount of force transmitted from` the jaws through the yoke. What :I "claim 'and "desire-to secure -by Letters Patent is: f f l f1'.v A selective elevator lock comprising a lockingl posi'tiong and means Operated by the l.knobs on a .shi pp'ei` cable -dur'ii'ig the travel of anvelevatoi car," for .displacing sa-'idob' structor into a position wherein the jjaivf is left free tobecoineoperative.'v -v 'Y V jaivp a movable obstructor Yafdapted''to' holdV saidjaw in' an inoperativeI position, '#ineans Y tending* Atomove theQjaiv Vinto 'operative"or`1i0A combination an elevator carand Aa sliipitieruca'ble 'having 'spaced@knobsi at difv`.fferei'it stages; said llock comprising a' yjaw adapted to be plac'edi'n anfinoperativef'posr v tion wherein it passes clear ofsuch knobs with' travel of tliecar, vand intovan` opera-A tive position Where 'it interferes Withana'dfrom thefinoperative to the .operative position, displaceable means arranged to hold `the jaw Vin its inoperative position-,and mechanism operablei'by sa'idiknobs in the vjacent knob, means tendingito shift said jaw 1' course ot travel ofthe car for shitting said under actuation by enlargements on a displaceable means into a position wherein. it permits 'return ot the jaw to operative position.v

able to displace the same into an inoperative location, a .shittable obstructor arranged to hold said trigger in the displaced location, and a propelling mechanism operable to move the obstructing member step by step shipper cable. 1

. 1 5. An elevator lock comprising a pivote-d jaw having `an arm, a trigger member suitably connected with said arm/for displacing the jaw when mo-ved in one direction, an

obstructor disk havinga notch adapted to admit said trigger andphaving a rim eX- tending troni said notch and arranged Vto hold the trigger in its displaced position, said disk having a seriesbt ratchetteeth, and a propelling mechanism including an oscillating pawl arranged to cooperate with said ratchet teeth anda pusher reciprocati'vely arranged and suitablyV connected withsaid pawl to impart oscillative movements thereto.

6. An elevator lock comprising a casing @having a guideway adapted. to admit a shipper cable and knobs on said cable, a

`locking jaw adapted` to extend into said ,guideway to interfere with .suoli knobs `ito'r moving said shipper cable vwith movement of the car on which the lock is mounted, a pusher mounted on the lock casing projecting into said. guideway and adapted to be moved byshipper cable knobs traveling relatively therethrough, an obstructor having means for holding .said jaw displaced andfbeing movable into a position wherein `it permits return of the jaw Jto-intertering position, a pawl. carrier, and arconnection between said pawl carrier and said pusher,

whereby the movements of the formeroscih late the latter, a pawl and complemental ratchet teeth, carried by the pawl carrier and obstructor respectively. n

7. In combination, an elevator car and a controller shipper cable having knobs arranged in pairs adjacent to the appointed stopping placesrof the car, a selective lockV including jaws arrangefil to cooperate with said knobs in shifting the cable to stop the car, a displacer connected with the jaws tor separating them, an obstructor cooperating with said displacer 'or retaining the latterv in the position where the jaws are opened, springs acting on the jaws tending to close them, the obstructor being movable and having a recess adapted to admit the displacer when brought into a certain position, a pawl.

and ratchet mechanism arranged and operable to move the obstructor step by step, and a pusher movable back and forth and being connected to the pawl carrier ott said pawl and ratchet mechanism, said pusher being normally projected into a position where it is encountered, and from which, it is pushed away, by said shipper cable knobs.

8. ln an elevator lock having-an obstructor and a pawl andl ratchet mechanism, including a pawl carrier, Jfor moving said obstructor step by step, a pusherprojerting into a position to be engaged and moved by knobs on a shipper cable, and a link connecting said pusher and pawl carrier and being arranged to comer approximately perpendicular'to the path of movement of the pusher. when the pawl carrier has .been moved tar enough to propel the vobstructor through one step ot-itsmovement. f

9. An elevator lock having an obstructor, a propelling mechanism for Amoving said obstructor step by step, said propelling mechanism including'a back and iorth moving pusher, an osoillative pawl carrier, and a link connecting the pusher and pawl carrier, the parts being so arranged that the link comes approximately perpendicular to the path of movement of its connection with ythe pusher` at the completion of the propeiling movement ot the pawl carrier.

10. ln. an elevator lock having a guide for .a shipper cable, the 'combination thereof with a shippercable passing through said guide, knobs on said cable, a pusher reciprocatively mounted in-the lock ,extending into said guide, a spring tending to project the pusher and permitting the latter to be forced inward'by pressure applied by knobs on the cable, lanoscillative pawl carrier, a link connecting said pawl `carrier with said pusher arranged to make an obtuse angle with the pusher when the latter is fully projected andy to become approximately perpendicular tothe pusher when the latter is displaced by one ot said knobs, a movable obstructor having a series ofratchet teeth, and a pawl carried Vby the pawl carrier complemental to said ratchet teeth and arranged to exert propelling -thrust when moved by the inward displacement of the pusher.

1l. An elevator lock comprising a casing, a pivoted jaw having an operating arm, a slide in engagement with said operating arm iooy ment adapted and having an eye, a pivoted trigger passing ing the slide through said eye and being adapted When moved in one direction about its pivot t0 shift said slide in a manner causing displace- In testinion ment of the jaw, saidtrigger having on its signature. outer side a latehing shoulder and the eye of the slide having a complemental abut-y to be interengaged for holdand trigger in the outwardly displaced position. f

y whereof I have aflixed my BUieT H. MACY. 

